\documentclass[14pt, aspectratio=169]{beamer}
\usetheme{PaloAlto}
\usecolortheme{crane}
\title{Self Introduction}
\author{Ruiming Guo}
\institute{Sichuan University}
\usefonttheme{serif}
\begin{document}

  \AtBeginSection[] {
    \begin{frame}<beamer>
      \tableofcontents[currentsection]
    \end{frame}
  }

  \begin{frame}
    \titlepage
  \end{frame}

  \begin{frame}
    \frametitle{Self Introduction}
    I'll introduce the thing that I most familiar with -- myself.
  \end{frame}

\begin{frame}
  \frametitle{Table of Contents}
  \tableofcontents
\end{frame}

\section{Life}
\begin{frame}
  \frametitle{Life}
  Life is pain but also colorful.

\end{frame}

\section{The Universe}
\begin{frame}
  \frametitle{The Universe}
  As we all know, the Universe will eventrually die.

  Every moment is precious.
  % 每一秒都值得珍惜.
\[
  \mathbf{e} = m c^2
\]
\end{frame}

\begin{frame}
  \frametitle{}

  $$
    \begin{aligned}
    t_{i}^{*} &=(C-1) \times \frac{\left(t_{i}-t_{m i n}\right)}{\left(t_{\max }-t_{\min }\right)} \\
    \mathbf{E}_{\left(x_{l}, y_{m}, t_{n}\right)} &=\sum_{x_{i}=x_{l} \atop y_{i}=y_{m}} p_{i} \max \left(0,1-\left|t_{n}-t_{i}^{*}\right|\right)
    \end{aligned}
  $$

\end{frame}

\section{and Everything}

\begin{frame}
  All is but the dust of time.
\end{frame}

\begin{frame}

  This is me, thank you!

\end{frame}

\end{document}
